12.
Maintenance and Care
a) General Information
Clean the exterior of the model and the remote control only with a soft, dry cloth or brush. Never use abrasive cleaning
agents or chemical solutions as these could damage the surfaces of the casings.
b) Inspection of the Mechanics
Check the mechanical parts of the model throughout at
regular intervals.
All screwed connections should be tight and should not
loosen up due to vibrations of the helicopter.
Make sure that the screws in the top set collar (1) and the
bottom set collar (2) of the main rotor shaft have a tight fit.
The two main gears of the drive (3) must be aligned cleanly
with the motor gears (4) and must not catch or have too
much clearance when turning.
On demand, loosen the motor attachment screws (5) and
slide a strip of paper (6) between the motor and main pinion.
Press the motor against the main pinion by hand and screw
it into position. After removing the paper, tooth backlash is
set.
Turning parts have to be easily movable but there should
not be a clearance in the bearing.
When replacing mechanical parts use only original spares
available from the manufacturer.
Figure 19
c) Replacing the Rotor Blades
If contact with an obstacle leaves visible danger on a rotor blade (cracks or broken parts), the rotor blade must be
replaced.
Observe the rotational direction of the rotor when replacing the main rotor blades. When viewed from above, the upper
rotor marked "A" turns counter-clockwise on the rotor blades and the lower one marked "B" turns clockwise.
Do not tighten the attachment screws of the rotor blades too much, so that the rotors can align at 180° to each other
in flight (also see figure 6 in section "Checking the Rotor Blade Retainer")
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